How to call a another drl file from one drl file
by Amila Silva
hi,
I have requirement to execute a chain of rules. One rule after another
and they are reusable.I need to know how to call another drl file from a drl
file. or in a then part of the
a rule.
thanks
Amila Silva
15 years, 5 months
Persistence and mina human task handling
by Balázs Molnár
Hello,
I tried to setup a sample standalone "hello" application that attempts to
run a process involving human tasks.
Main components were:
- mina task server (as documentation hinted, based on a sample),
- standalone "hello sort of" application running a ruleflow with some
workitems including a human task too,
- eclipse human task view.
I setup the persistence - following the documentation, asked for a jta
datasource and used bitronix transaction manager.
The application:
- begins a new user transaction
- creates a new process instance in a stateful session
- calls fireallrules
- waits on the console with System.in.read() (this was already a workaround
to avoid completing the user transaction before the human task is handled in
the HT view, this otherwise caused a nullpointer assigment at line 83 in
JPAWorkItemManager which tried to refer to variable "em" which when set
returned null for the following assignment if usertransaction were
committed:
EntityManager em = (EntityManager) this.workingMemory.getEnvironment().get(
EnvironmentName.ENTITY_MANAGER );)
... following the above the message reaches the human task server, and then
the task appears in the human task view - so far so good.
Then when the task is started and completed in the view, the
"GetCompletedTaskResponseHandler.execute()" begins handling the completed
message. Unfortunately this call fails with :
" no transaction started on this thread"
I have then checked the threads in the debug view and looked like the
message response is actually running in the "NioProcessor" thread. At this
point I got stuck. If there is some guideance on how to correctly setup
transaction management and Mina task client/human task work item handler it
would be very much appreciated.
thank you.
15 years, 5 months
Unable to load dialect 'org.drools.rule.builder.dialect.java.JavaDialectConfiguration:
by Pardeep.Ruhil＠lntinfotech.com
Hi,
I am newbie to drools. I am facing the below exception when I m trying to
run my code through
Command Prompt.
I have set the all the jars in the xbootclasspath of my application , but
still I am getting the same exception.
I am able to run my application in eclipse , but the same when i run from
Command Prompt give me this exception.
Please help to get through the situation.
My exception is :
org.drools.RuntimeDroolsException: Unable to load dialect
'org.drools.rule.builder.dialect.java.JavaDialectConfiguration:java
:org.drools.rule.builder.dialect.java.JavaDialectConfiguration'
at
org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:274)
at
org.drools.compiler.PackageBuilderConfiguration.buildDialectConfigurationMap(PackageBuilderConfiguration.java:259)
at
org.drools.compiler.PackageBuilderConfiguration.init(PackageBuilderConfiguration.java:176)
at
org.drools.compiler.PackageBuilderConfiguration.<init>(PackageBuilderConfiguration.java:153)
at
org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:242)
.
.
.
Caused by: java.lang.NullPointerException
at
org.drools.rule.builder.dialect.java.JavaDialectConfiguration.setCompiler(JavaDialectConfiguration.java:92)
at
org.drools.rule.builder.dialect.java.JavaDialectConfiguration.init(JavaDialectConfiguration.java:55)
at
org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:270)
Thanks & Regards
Pardeep Ruhil
L&T Infotech Ltd
Mumbai
Ph: +919820283884
Larsen & Toubro Infotech Ltd.
www.Lntinfotech.com
This Document is classified as:
L&T Infotech Proprietary L&T Infotech Confidential L&T Infotech
Internal Use Only L&T Infotech General Business
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intended recipient (s) If you are not the intended recipient, please do
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15 years, 5 months
not able to debug drools flow
by Vishal Anand
Hi,
I am using Drools 5.0 and have create a simple application using drools flow, it runs perfectly but when trying to debug it as n drools application I get the following error:
FATAL ERROR in native method: JDWP No transports initialized, jvmtiError=AGENT_ERROR_TRANSPORT_INIT(197)
ERROR: transport error 202: connect failed: Connection refused
ERROR: JDWP Transport dt_socket failed to initialize, TRANSPORT_INIT(510)
JDWP exit error AGENT_ERROR_TRANSPORT_INIT(197): No transports initialized [../../../src/share/back/debugInit.c:690]
While stack trace shows the following:
java.lang.IncompatibleClassChangeError: Expected static method org.drools.eclipse.launching.DroolsVMDebugger.renderCommandLine([Ljava/lang/String;)Ljava/lang/String;
at org.drools.eclipse.launching.DroolsVMDebugger.run(Unknown Source)
at org.eclipse.jdt.launching.JavaLaunchDelegate.launch(JavaLaunchDelegate.java:101)
at org.drools.eclipse.launching.DroolsLaunchConfigurationDelegate.launch(Unknown Source)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:853)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:703)
at org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:866)
at org.eclipse.debug.internal.ui.DebugUIPlugin$8.run(DebugUIPlugin.java:1069)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
I am using eclipse 3.4
What could be the issue ?
Thanks
Vishal
15 years, 5 months
Checking variable values in rule conditions
by skasab2s
Hi guys,
as far as I understood, in the rule conditions I can check what objects are
in the working memory and so on..
But can I check for example a global variable value which I have declared in
the same .DRL-File?
for example:
global Boolean testWeanable
....
when
testWeanable==true
then
do this and that
end
or should I insert the variable testWeanable into the Working Memory to do
this?
Thanks a lot and many greets!
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15 years, 5 months
Problem calling a function returning String
by rainbowflower
Hi all,
I am rather new to Drools and I have a problem using functions.
I have a rule like:
rule "rule 1"
when
eval(getEVAVersionsNr() == "1234")
then
System.out.println("rule fired");
end
The getEVAVersionsNr() method is present in a Java class
"ValidationUtilities.java", which I'm importing in my drl file and it looks
like this:
public class ValidationUtilities {
public static String evaVersionsNr;
public static String getZEVAVersionsNummer() {
return evaVersionsNr;
}
}
This static attribute "evaVersionsNr" is set to "1234" from another Java
class before I fire my rules. So, I assume that the eval construct should
return true. But, it does not return true and the consequence is not
exected.
Further info:
When I modify my rule like:
rule "rule 1"
when
eval(true)
then
System.out.println(getEVAVersionsNr());
end
the consequence part is getting executed and 1234 is getting printed.
I am really lost and I could not find out what goes wrong. If someone could
find out what I am missing, I shall be thankful.
Thanks in advance.
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15 years, 5 months
